Jpouch - leakage at night only

I have had a jpouch since 1996, basically in remission since. I have had a couple hiccups - bartholyn cyst, recto-vaginal fistula but no hospitalizations since the surgery. For the past 15 months I have had fecal incontinance, but ONLY while I am sleeping. I have 97% control while awake during the day. I cannot figure out why this is happening only at night. My meds have not changed, though maybe they need to. I was prescribed suppositories but they really didn't do anything. I am wondering if I need to try some newer meds. I have been on the same ones for about 10 years or so - azathioprine, cipro/flagyl rotation every 2 weeks, OTC loperamide, metamucil powder & gummies. I am at a loss. I know some have things way worse than I do, but this has thrown me for a loop, and I can't seem to control it. Thanks in advance for any input.